Benno Evers created MESOS-9650:
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Summary: Document the semantics of operation pipelining
Key: MESOS-9650
URL: https://issues.apache.org/jira/browse/MESOS-9650
Project: Mesos
Issue Type: Improvement
Reporter: Benno Evers
In our `Accept` protobuf, frameworks can specify multiple offer operations that
are to be executed on the received offer:
https://github.com/apache/mesos/blob/40abcefab4f2887e61786365b46bc22155a2d1ff/include/mesos/scheduler/scheduler.proto#L317
However, the semantics of specifying multiple operations in this way are
currently not documented anywhere I could find, except for a comment on that
protobuf that the master will be "performing the specified operations in a
sequential manner."
In particular, it is unclear what will happen if any operation in the sequence
fails, or at which particular points during the operation the master will move
on to the next (i.e. if we have [RESERVE, LAUNCH, RESERVE], when exactly does
the second reserve happen), and if there are any restrictions on combining
operations in this way.
While all of this can be figured out by reading the master source code, we
should add some user-facing documentation about this.
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